<template>
  <view style="margin-top: 40rpx;" @click="showSelector=!showSelector">
    <view class="maskbox" v-show="showSelector&&showMask"></view>
    <view class="uni-combox" :style="{zIndex:showSelector?999:1}">
      <view class="uni-combox__input-box">
        <view class="combox_input_view">
          <up-input
              placeholder="请选择店铺"
              border="surround"
              shape="circle"
              v-model="inputVal"
          >
            <template #suffix>
              <up-icon name="arrow-down" color="#DDDDDD" size="28" @click="toggleSelector"></up-icon>
            </template>
          </up-input>
          <view class="uni-combox__selector" v-if="showSelector">
            <scroll-view scroll-y="true" class="uni-combox__selector-scroll">
              <view class="uni-combox__selector-empty" v-if="filterCandidatesLength === 0">
                <text>{{ emptyTips }}</text>
              </view>
              <view class="uni-combox__selector-item" v-for="(boxname,boxIdx) in props.candidates" :key="boxIdx"
                    @click.stop="onSelectorClick(boxIdx)"
              >
                <text>{{ boxname }}</text>
              </view>
            </scroll-view>
          </view>
        </view>
      </view>
    </view>
  </view>
</template>

<script setup>
import {ref, computed, onMounted, onBeforeUnmount, watch} from 'vue'
import {onLoad} from '@dcloudio/uni-app'

const props = defineProps(['candidates', 'emptyTips'])
const emit = defineEmits(['selectorClick', 'onChange'])

let showSelector = ref(false);
let inputVal = ref('');
let selectList = ref([])

const filterCandidatesLength = computed(() => {
  return props.candidates.length
})
let value = watch(() => inputVal.value, (newVal) => {
  emit('onChange', newVal)
}, {
  immediate: true
})

const toggleSelector = () => {
  showSelector.value = !showSelector.value
}

const onSelectorClick = (index) => {
  inputVal.value = props.candidates[index];
  emit('selectorClick', index)
  showSelector.value = false
}
</script>

<style scoped>
.uni-combox {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  min-height: 40px;
  flex-direction: row;
  align-items: center;
  position: relative;
}

.uni-combox__label {
  font-size: 16px;
  line-height: 22px;
  padding-right: 10px;
  color: #999999;
}

.uni-combox__input-box {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex: 1;
  flex-direction: column;
}

.combox_tags {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.combox_tag {
  padding: 10rpx 15rpx;
  background-color: #F0F2F5;
  color: #94979D;
  margin-right: 10rpx;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 10rpx;
}

.combox_tag .tag_name {
  margin-right: 10rpx;
}

.combox_input_view {
  position: relative;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex: 1;
  flex-direction: row;
  align-items: center;
  min-width: 100%;
}

.uni-combox__input {
  flex: 1;
  font-size: 16px;
  height: 22px;
  line-height: 22px;
}

.uni-combox__input-arrow {
  padding: 10px;
}

.uni-combox__selector {
  height: 200rpx;
  overflow: auto;
  box-sizing: border-box;
  position: absolute;
  top: 50px;
  left: 0;
  width: 100%;
  background-color: #FFFFFF;
  border-radius: 6px;
  box-shadow: #DDDDDD 4px 4px 8px, #DDDDDD -4px -4px 8px;
  z-index: 2;
}

.uni-combox__selector-scroll {
  box-sizing: border-box;
}

.uni-combox__selector::before {
  content: '';
  position: absolute;
  width: 0;
  height: 0;
  border-bottom: solid 6px #FFFFFF;
  border-right: solid 6px transparent;
  border-left: solid 6px transparent;
  left: 50%;
  top: -6px;
  margin-left: -6px;
}

.uni-combox__selector-empty,
.uni-combox__selector-item {
  /* #ifdef APP-NVUE */
  display: flex;
  /* #endif */
  line-height: 36px;
  font-size: 14px;
  text-align: center;
  border-bottom: solid 1px #DDDDDD;
  /* margin: 0px 10px; */
}

.uni-combox__selector-empty:last-child,
.uni-combox__selector-item:last-child {
  border-bottom: none;
}

.maskbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99;
}
</style>